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https://issues.apache.org/jira/browse/LUCENE-1879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12855377#action_12855377
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Michael Busch commented on LUCENE-1879:
---------------------------------------
{quote}
I'll start by describing the limitations of the current design (whether its the
approach or the code is debatable):
{quote}
FWIW: The attached code and approach was never meant to be committed. I
attached it for legal reasons, as it contains the IP that IBM donated to Apache
via the software grant. Apache requires to attach the code that is covered by
such a grant.
I wouldn't want the master/slave approach in Lucene core. You can implement it
much nicer *inside* of Lucene. The attached code however was developed with
the requirement of having to run on top of an unmodified Lucene version.
{quote}
I've realized this when I found that if tests (in this patch) are run with
"-ea", there are many assert exceptions that are printed from
IndexWriter.startCommit.
{quote}
The code runs without exceptions with Lucene 2.4. It doesn't work with
2.9/3.0, but you'll find an upgraded version that works with 3.0 within IBM,
Shai.
> Parallel incremental indexing
> -----------------------------
>
> Key: LUCENE-1879
> URL: https://issues.apache.org/jira/browse/LUCENE-1879
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Index
> Reporter: Michael Busch
> Assignee: Michael Busch
> Fix For: 3.1
>
> Attachments: parallel_incremental_indexing.tar
>
>
> A new feature that allows building parallel indexes and keeping them in sync
> on a docID level, independent of the choice of the MergePolicy/MergeScheduler.
> Find details on the wiki page for this feature:
> http://wiki.apache.org/lucene-java/ParallelIncrementalIndexing
> Discussion on java-dev:
> http://markmail.org/thread/ql3oxzkob7aqf3jd
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